gaskill



i glatten gisten getint @frn GEORGE BUEKET Ann SAMUEL M -Q GASKILL, OE BLUEFTON, OHIO.-

' Letters Patent Zlo. 63,009, dated l-Im'clt 19,'18GL l IMPROVEMENT lli HEADBLOGKS PGR SAW-MILLS...

TO ALL WHOM IT MAY CONOERN:

Be it known that we, GEOEGE BURKET and SAMUEL M, GAsnILL, of Blanton, in the county ot' Allen, andr State of Ohio, have invented a new and improved Head-Block for Saw-Mills; and we do hereby declare that the following isa full, clear, and enact'description thereof, which wille'nable those skilled in the art to Amake and use the same, reference being had to the accompanying drawings forming part o f this specicationfin which- Figure 1 is a side View of our invention. 'A i' 4Figure 2, a plan or top view-ofv the same.

Figure, a transverse vertical section ofthe same, taken in the line .fc rc, tig. 2.

Figure 4, a horizontal section of the same, taken in the liney y, Hg. 1. l

Figure 5, a det-ached plan orv top view of a portion .pertaining to the same.

Figure 6, an inverted planet' a knee or stand, and pertaining to the same.

Figure 7,- a detached view of a portion Aof a shaft pertaining to the same, with weightedor loaded lever attached; and i Figure 8, a section of theisame, taken in the line z z.

Similarletters of reference indicate corresponding parts.

This invention relates to anewand improved head-block for saw-mills, and it consists in an improved mechanism for setting the log to the saw, and also in an improved reversing mechanism for gigging back the carriage, as hereinafter fully shown and described. I i

A. A. represent the ways or guides on which the carriage B works, the latter being operated by a pinion gearing into a'rack underneath the carriage as usual, and the pinion-shaft, havingtwo pulleys `upon it, over one of which a straight'belt is fitted, and a cross-belt over the other; an idle or loose pulley is also placed on this shaft to receive the belt which is not in use.' This arrangement is precisely the saine as that nowusedtfo'r operating the carriage.

O'ur improvement' relates to a inode of operatingor shifting the belts tog-ive the feed andrev'ersing or gigging-back movement to'the carriage as hereinafter shown and described.

'C represents a block, whichis keyed, or otherwise secured, transverse-ly on the carriage B, and having a .horizontal plate,` a, fitted in grooves in its upper part so that it may slide freely back and forth therein.

This' plate a has aknee or standard, D, on its upper surface, against which the' logl E to besawed abats, and is secured to it by dogs in the usual way, tllclog resting on the block C, as shown in fig. 3.

The under side of the plate a has a cavity init containing a series 'of pawls which rest u'ponu rack, F, placed longitudinally in the block C, and so arranged that it may slide therein, or have a reciprocating motion imparted to it; said pawls'being independent of cach other, but lcapable of all being raised simultaneously from the rack by having a bit or projection, e, on the shaft d onv which vthe -pawls are 4fitted, said bit or projection fitting in a recess in the pawls, as shown in iig. 3, and the shaft el provided with la lever, FX, for the convenience of turning'it.

The rack F, in connection with the pawls I), sets the log to the saw',- the rack, when moved in the directionindicated by the arrow 1, moving'the knee or standard D in consequence ot" the `'teeth of the rack acting against the pawls b. When the rack is moved in theopposite direction, as indicated by arrow 2, the teeth of the rack slip past the pawls, and the linee or standard-is' not moved. This will be fully understood by referring to tig. 3.

The pawls In are of diierent lengths, 'as shown in Iig. (i, so as not to admit of anyv useless play or move= ment of the rack F. `Four of 4these pawle may be used,l but we do not `confine ourselves to any particular number.

The rack Fis operated as follows,

Gf is a bar which is'tted on arms e e attached toone side of the carriage B, and allowed to slide freely thereon. This bar works through the block C, and has bevelled bars H H attached to each side of itby clamps, I, s'o arranged that the barsI-l H may be adjusted nearer together' or further apart, as may be desired. The

bars H H( may act against friction-rollers in' the block C, the barfH mowing the rack F, and eonsequeritlythe knee or standard D,lin the direction indicated by arrow 1; -the bar Hlnovi'ng it in lthe opposite direction, as indicated by arrow 12. (See figs. 2 und By this arrangement it will be seen that the knee or standard is' moved forward,'and log set to the saw,

until theformer reaches the end of. the block C, when the pa'wls b are raised free from the rack turning the shaft d, and the knee .or standard moved backto its original position, and another lo'gJplaced 'on thev'block C.

The keysfof the clamps I have their thin edges towards the'block- C, so that' in case-.the barG 'be moved too -far the keys will come in contact with block Gand be knocked out,'thereby loosening the clamps andpreventing any injury to any of the working parts.l y n p 0n the bar'G there! are also two pendent bars,'J'J'.seoured in 4position by keys g. The bars J J4 are secured ata distance apart equal to the length of the log. I

. To the flooring of the mill thereis securedja stop, K, so arranged that it may be raised and lowered, that is to say, turnedu-pward to a vertical position, -or turned ldownward in a horizontal one. When-thisjstop is raised, and the carriagegiggecl back, the bar J will come in contact with it and avert themotion of the bar G,V

and asthe block C will more on with the carriage, the bevelled bar Hwill, towards the close of the giggingback movement` of the carriage, move the knee -or standard in the direction indicated by arrow 1, and set the. '10g to the saw, the knee or standard being moved back towards the termination of lthe feed movement of the,

carriage by the bar J coming in contact with the stop K, so as Vto -avert the bar G and admit'of :the hevelled bar H acting upon the block C. u.

The setting of the log for sawing'tliick o'rthin lumber is effected by a screw, L,in the4 end of the rack F, said screw increasing or diminishing the space between the shoulders or pulleys between which the bevelled bars H Hf work, as/will' be fully understood by referring to fig. 8, in which '"t'hc screw Lis shown connected torn movable shoulder oribearing, 7i. A

The block C is attached to the carriage by means of a key, z', which admits. ofsaid block being adjusted Y to suit any'lengthof log desired.

The reversing of the move'mentof the carriage B is veffected as follows M is Aa shaft placed transversely with the carriage B land ways A. A, the shaft running through the latter.

This shaft has two levers, N O, attached to it, one, N, being at the outer end of said shaft, and permanently attached to it, with a weight, z, on its end, and the other,'0, being allowed a certain degree of free turning movement on the shaft, and having a weight, iX, on its end; apirnj, passing through the shaft in connection -with lips, c,on 'the hub of the lever, determining the'length of the free movement of the lever 0. (See figs.y

This'lever O is actuated by adjustable stops,"l`,`on a bar, P, attached to one side-of the carriage B, said stops striking the lever Oat the close of each movement of the carriage, and throwing it over so as to turn the shaft and actuate the belt shipper, the weight z" being suiciently heavy to effect that result. The weight z" on the lever N is designed to be suiciently heavy to keep the friction pulley pressed suiiiciently hard upon the belt to insure the running of the carriage.V

We would remark that we design to have the rack F and bar G supplied with levers, Q Q, so arranged as' to admitV of saidparts being operated by hand when necessaryor desired.

Having thusdescribed our invention, what we claim as new, and desire to secure by Letters Patent, isf- The bar G provided with .the adjustable bevelled plates H H', secured by clamps II, substantially us shown,

and'connected or arranged with the rack F, and also provided with the pendent bars J J;thc abo-.re parts being used in connection with the lstop K for operating the rack F, substantially as described'.

' GEORGE BUllK'E'l,

SAMUEL M. GSKILL."

Witnesses:

JOHN H. FnNsLnn, CHARLES GARNER. 

